Improved hole test fixture

Abstract

The utility model discloses an improved hole testing jig, which comprises a pressing plate and a plurality of testing probe rods arranged on the pressing plate, the positions of the testing probe rods preset on the pressing plate correspond to the positions of the hole diameters of a product to be tested, and the testing probe rods are in arc-shaped surface contact with the pressing plate. When the pressing plate is pressed on the to-be-tested product, small-angle deflection can be generated between the test probe rod and the pressing plate. The test probe rod and the pressing plate do not need to be connected through a soft material and do not need to be connected through a double-layer pressing plate, so that the overall structure is simpler and more effective, if the position of the hole diameter in the to-be-tested product and the preset position have deviation within an allowable range, the test probe rod can also be inserted into the hole diameter of the to-be-tested product, test failure cannot be caused, and the test efficiency is improved. Therefore, the whole test can be continuously carried out.

Description

Technical Field

[0001] The utility model relates to the field of testing, in particular to an improved hole testing jig. Background Art

[0002] The meaning of GD&T testing is the test of form and position tolerances. The processed parts will have dimensional tolerances. Therefore, the actual shape or relative position of the points, lines, and surfaces that constitute the geometric features of the parts will differ from the shape and relative position specified by the ideal geometric body. This difference in shape is the form tolerance, and the difference in relative position is the position tolerance. These differences are collectively called form and position tolerances (geometric tolerances).

[0003] As the degree of automation of various products becomes higher and higher, the requirements for the form and position tolerances of each accessory are becoming more and more stringent, because excessive form and position tolerances of an accessory may cause problems in the subsequent assembly process. Taking the automotive field as an example, in the production process of automobile headlights, many jacks will be distributed on the overall mold. In addition to the function of connection and fixation, these jacks also play a role in positioning. The position, aperture size and depth of each jack are strictly positioned during the design. Other structures in the mold may be designed and extended based on the relative position of the jack, so the requirements for form and position tolerance testing of these apertures are extremely high.

[0004] The utility model patent with publication number CN221006139U discloses a test fixture for hole testing. By arranging a connecting portion made of a soft material in the through hole of the pressure plate, an elastic connection is formed between the test probe and the pressure plate, so that the test probe can be deflected at a small angle. However, the above structural scheme is complicated and requires a double-layer pressure plate to fix the soft material, which increases the weight and cost of the fixture. At the same time, the soft material is prone to breakage during long-term use, causing the test probe to fall off the pressure plate. Utility Model Content

[0005] In order to solve the above problems, the present invention provides an improved hole testing fixture, including a pressure plate and several test probes installed on the pressure plate. The positions of the test probes preset on the pressure plate correspond to the positions of the apertures of the product to be tested. There is an arc-shaped surface contact between the test probes and the pressure plate. When the pressure plate is pressed onto the product to be tested, a small angle deflection can be generated between the test probes and the pressure plate.

[0006] Furthermore, a plurality of first through holes are provided on the pressure plate, a clamping member is provided inside the pressure plate, the clamping member is provided on both sides of the first through hole, the test probe rod passes through the first through hole and is clamped from the side by the clamping member, and the arc surface contact is provided between the side wall of the test probe rod and the clamping member.

[0007] Furthermore, the test probe rod includes a connecting seat and a test rod passing through the connecting seat. An arc-shaped inner recess is provided on the side wall of the connecting seat, and an arc-shaped outer protrusion that cooperates with the arc-shaped inner recess is provided on the clamping member. When the clamping member is clamped on both sides of the test probe rod, the arc-shaped outer protrusion and the arc-shaped inner recess fit together to form an arc-shaped contact surface.

[0008] Furthermore, the diameter of the connecting seat is smaller than the inner diameter of the first through hole.

[0009] Furthermore, a second through hole and a third through hole are respectively provided at the top and bottom of the connecting seat, and the test rod includes a first rod body and a second rod body. When the test rod passes through the connecting seat, the first rod body passes through the second through hole and extends from the top of the connecting seat, and the second rod body passes through the third through hole and extends from the bottom of the connecting seat.

[0010] Furthermore, the diameter of the second rod is greater than that of the first rod, and the second rod is connected to the third through hole through interference fit.

[0011] Furthermore, an elastic fastening ring is provided around the second through hole, and the elastic fastening ring fastens and fixes the first rod body passing through the second through hole from the top of the connecting seat.

[0012] Furthermore, the clamping member and the pressing plate are provided with fourth through holes at corresponding positions, and a screw is provided in the fourth through hole.

[0013] The beneficial effects of the utility model are:

[0014] In the present invention, when the pressure plate is pressed against the product under test, the test probe can be deflected at a small angle along the pressure plate, allowing the test probe to be better inserted into the product's aperture, thereby completing the aperture GD&T test. Because the test probe and the pressure plate contact each other via an arcuate surface, the test probe can be deflected at a small angle along the pressure plate. This allows the test probe to remain inserted into the product's aperture if the position of the aperture on the product under test deviates slightly from the preset position, provided the deviation is within a reasonable range. When the pressure plate is pressed against the product under test, the test probe can be deflected at a small angle, allowing the test probe to remain inserted into the product's aperture, thereby completing the test. Compared to the prior art, the deflection mechanism between the test probe and the pressure plate in the present invention is simpler. Furthermore, even if the position of the aperture on the product under test deviates within the allowable range from the preset position, the test probe can be inserted into the product's aperture without causing a test failure, thereby ensuring that the entire test can continue.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is an exploded view of the overall structure of the utility model;

[0019] Figure 3 This is a diagram of the assembly structure between the clamping member and the test probe of the present invention;

[0020] Figure 4 This is a structural exploded view of the test probe of the present invention;

[0021] Figure 5 This is a schematic structural diagram of the test socket of the present utility model;

[0022] Figure 6 It is a cross-sectional view of the assembly structure between the clamping member and the test probe rod of the present invention.

[0023] The reference numerals and names in the figures are as follows:

[0024] The pressure plate 100, the test probe 200, the first through hole 110, the clamping member 120, the connecting seat 210, the test rod 220, the arc-shaped inner recess 211, the arc-shaped outer protrusion 121, the second through hole 212, the third through hole 213, the first rod body 221, the second rod body 222, the elastic fastening ring 230, the fourth through hole 130, and the screw 131. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The present invention will be described in more detail. It should be understood that the specific embodiments described herein are intended only to explain the present invention and are not intended to limit the present invention. It should be noted that when an element is described as being "fixed to" another element, it may be directly on the other element, or one or more intervening elements may be present therebetween. When an element is described as being "connected to" another element, it may be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0027] In the description of the present invention, it should be noted that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present invention, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art in the art of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] The preferred embodiment of the present invention will be further described with reference to the accompanying drawings. Figure 1 and Figure 2As shown, an improved hole testing fixture includes a pressing plate 100 and several test probes 200 installed on the pressing plate 100. The positions of the test probes 200 preset on the pressing plate 100 correspond to the positions of the apertures of the product to be tested. When the aperture GD&T test is required, the pressing plate 100 is pressed onto the product to be tested. If the test probes 200 can be inserted into the aperture of the product to be tested, it means that there is no problem with the position of the aperture of the product to be tested. If the test probes 200 cannot be inserted into the aperture of the product to be tested, it means that there is a problem with the position of the aperture of the product to be tested. The test probes 200 and the pressing plate 100 are in arc-shaped surface contact, so that a small angle of deflection can be generated between the test probes 200 and the pressing plate 100.

[0031] When the pressure plate 100 is pressed against the product to be tested, the test probe 200 can be deflected at a small angle along the direction of the pressure plate 100, so that the test probe 200 can be better inserted into the aperture of the product to be tested, thereby completing the aperture GD&T test. From the above embodiment, it can be seen that the test probe 200 of the present application contacts the pressure plate 100 through an arcuate surface, so the test probe 200 can be deflected at a small angle along the direction of the pressure plate 100. In this way, if the position of the aperture on the product to be tested deviates slightly from the preset position, and this deviation is within a reasonable range, then when the pressure plate 100 is pressed against the product to be tested, the test probe 200 will deflect at a small angle, so that the test probe 200 can still be inserted into the aperture of the product to be tested, thereby completing the test.

[0032] Compared with the prior art, the deflection mechanism between the test probe 200 and the pressure plate 100 of the present application is simpler, and if there is a deviation between the position of the aperture on the product to be tested and the preset position within the allowable range, the test probe 200 can also be inserted into the aperture of the product to be tested, which will not cause test failure, thereby ensuring that the entire test can continue.

[0033] On the basis of the above embodiment, Figure 2 and Figure 3 As shown, the pressing plate 100 is provided with a plurality of first through-holes 110. Clamping members 120 are disposed within the pressing plate 100 and are disposed on either side of the first through-holes 110. The test probe 200 passes through the first through-holes 110 and is laterally clamped by the clamping members 120. The arcuate surface contact is provided between the sidewalls of the test probe 200 and the clamping members 120. Thus, if there is a slight deviation between the position of the aperture on the product to be tested and the preset position, and this deviation is within a reasonable range, then when the pressing plate 100 is pressed against the product to be tested, the test probe 200 will deflect slightly relative to the clamping members 120.

[0034] On the basis of the above embodiment, Figure 3 and Figure 6 As shown, the test probe 200 includes a connecting seat 210 and a test rod 220 passing through the connecting seat 210. An arc-shaped inner recess 211 is provided on the side wall of the connecting seat 210, and an arc-shaped outer protrusion 121 cooperating with the arc-shaped inner recess 211 is provided on the clamping member 120. When the clamping member 120 is clamped on both sides of the test probe 200, the arc-shaped outer protrusion 121 and the arc-shaped inner recess 211 fit together to form an arc-shaped contact surface, so that a small angle deflection can be generated between the test probe 200 and the pressure plate 100.

[0035] Further to the above embodiment, the diameter of the connecting seat 210 is smaller than the inner diameter of the first through hole 110, so that when a small angle deflection can be generated between the test probe 200 and the pressure plate 100, the connecting seat 210 can have sufficient redundant space in the first through hole 110 for deflection.

[0036] In some embodiments, combined Figure 4 and Figure 5 As shown, a second through hole 212 and a third through hole 213 are respectively provided at the top and bottom of the connecting seat 210, and the test rod 220 includes a first rod body 221 and a second rod body 222. When the test rod 220 passes through the connecting seat 210, the first rod body 221 passes through the second through hole 212 and extends from the top of the connecting seat 210, and the second rod body 222 passes through the third through hole 213 and extends from the bottom of the connecting seat 210. Preferably, the diameter of the second rod body 222 is larger than the diameter of the first rod body 221, and the second rod body 222 is interference fit with the third through hole 213, so that when the test rod 220 passes through the connecting seat 210, the test rod 220 and the connecting seat 210 can be fixed.

[0037] On the basis of the above embodiment, Figure 5 As shown, an elastic fastening ring 230 is provided around the second through hole 212. The elastic fastening ring 230 fastens and fixes the first rod body 221 passing through the second through hole 212 from the top of the connecting seat 210, thereby further improving the stability of the fixation between the test rod 220 and the connecting seat 210.

[0038] In some embodiments, as Figure 2 As shown, fourth through holes 130 corresponding in position are provided on the clamping member 120 and the pressing plate 100 , and screws 131 are provided in the fourth through holes 130 , so that the clamping member 120 and the pressing plate 100 are fixed together by the screws 131 .

[0039] The above exemplary embodiments are detailed, and the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included within the present invention.

Claims

1. An improved hole testing fixture, characterized in that: The invention comprises a pressing plate (100) and a plurality of test probes (200) mounted on the pressing plate (100), wherein the positions of the test probes (200) preset on the pressing plate (100) correspond to the positions of the apertures of the product to be tested, and the test probes (200) and the pressing plate (100) are in arc-shaped surface contact, and when the pressing plate (100) is pressed onto the product to be tested, a small angle of deflection can be generated between the test probes (200) and the pressing plate (100).

2. The improved hole testing jig according to claim 1, characterized in that: A plurality of first through holes (110) are provided on the pressure plate (100), a clamping member (120) is provided in the pressure plate (100), the clamping member (120) is provided on both sides of the first through holes (110), the test probe (200) passes through the first through holes (110) and is clamped from the side by the clamping member (120), and the arc-shaped surface contact is provided between the side wall of the test probe (200) and the clamping member (120).

3. The improved hole testing jig according to claim 2, characterized in that: The test probe (200) comprises a connecting seat (210) and a test rod (220) passing through the connecting seat (210); a curved inner recess (211) is provided on a side wall of the connecting seat (210); and a curved outer protrusion (121) cooperating with the curved inner recess (211) is provided on the clamping member (120); when the clamping member (120) is clamped on both sides of the test probe (200), the curved outer protrusion (121) and the curved inner recess (211) fit together to form a curved contact surface.

4. The improved hole testing jig according to claim 3, characterized in that: The diameter of the connecting seat (210) is smaller than the inner diameter of the first through hole (110).

5. The improved hole testing jig according to claim 3, characterized in that: A second through hole (212) and a third through hole (213) are respectively provided at the top and bottom of the connecting seat (210); the testing rod (220) comprises a first rod body (221) and a second rod body (222); when the testing rod (220) passes through the connecting seat (210), the first rod body (221) passes through the second through hole (212) and extends from the top of the connecting seat (210); and the second rod body (222) passes through the third through hole (213) and extends from the bottom of the connecting seat (210).

6. The improved hole testing jig according to claim 5, characterized in that: The diameter of the second rod body (222) is greater than the diameter of the first rod body (221), and the second rod body (222) is connected to the third through hole (213) in an interference fit.

7. The improved hole testing jig according to claim 6, characterized in that: An elastic fastening ring (230) is provided around the second through hole (212), and the elastic fastening ring (230) fastens and fixes the first rod (221) passing through the second through hole (212) from the top of the connecting seat (210).

8. The improved hole testing jig according to claim 2, characterized in that: The clamping member (120) and the pressing plate (100) are provided with fourth through holes (130) at corresponding positions, and a screw rod (131) is provided in the fourth through hole (130).

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